Great Bear River
Encyclopedia
The 113 km-long Great Bear River, which drains the Great Bear Lake
Great Bear Lake
Great Bear Lake is the largest lake entirely within Canada , the third or fourth largest in North America, and the seventh or eighth largest in the world...

 westward through marshes into the Mackenzie River
Mackenzie River
The Mackenzie River is the largest river system in Canada. It flows through a vast, isolated region of forest and tundra entirely within the country's Northwest Territories, although its many tributaries reach into four other Canadian provinces and territories...

, forms an important transportation link during its four ice-free months. It originates at south-west bay of the lake. The river has irregular meander pattern 350 m (1,148.3 ft) wide channel with average depth 6 m (19.7 ft). Historic air photos show no evidence of bank erosion or channel migration in a 50 year period.

The low discharge rate is due to small amount of precipitation in watershed area. Great Bear River contained open reaches that had melted out in place over 80% of its length in 1972 and 1974.

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